EP 1742487 A1 20070110 - Reflective type light valve projection device
Title (en)
Reflective type light valve projection device
Title (de)
Projektionsvorrichtung mit reflektivem Lichtventil
Title (fr)
Dispositif de projection avec modulateur de lumière réflechissant
Publication
Application
Priority
EP 05012754 A 20050614
Abstract (en)
A reflective type light valve projection device comprises an incident light source, a first and a second dichroic beam splitters/combiners, three light valves of the three primary colors and a projection lens. The light source provides a white light. The first dichroic beam splitter/combiner can reflect the first primary color and transmit the other two primary colors, and the second dichroic beam splitter/combiner can respectively reflect and transmit the two primary colors passing through the first dichroic beam splitter/combiner, hence completely separating the three primary colors. After the three primary colors are respectively modulated and reflected by the three light valves, they are combined by the first and second dichroic beam splitters/combiners to form a full color image, which is finally projected out by the projection lens. The optimum full-color projection effect can thus be accomplished with the least component.
IPC 8 full level
H04N 9/31 (2006.01)
CPC (source: EP)
H04N 9/3105 (2013.01)
Citation (search report)
- [X] US 6478429 B1 20021112 - ARITAKE HIROKAZU [JP], et al
- [X] US 5704701 A 19980106 - KAVANAGH MARTIN [GB], et al
- [A] US 6185041 B1 20010206 - TADIC-GALEB BILJANA [US], et al
- [A] EDWARD H. STUPP, MATTHEW S. BRENNESHOLTZ: "Projection Displays", 1999, JOHN WILEY & SONS, CHICHESTER, XP002353343
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR LV MK YU
DOCDB simple family (publication)
DOCDB simple family (application)
EP 05012754 A 20050614